Perhaps you should try some spelling variations:
thieu bien » thieu nien, tieu bieu, hien bien
hanh tai » thanh tai, hang tai, han tai
bien cac » vien cac, dien cac, bien ca
ve triet » va trien, su triet
tu sach » thu sach, su sach, te sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
sach ky » sac ky, sach y, sach ty
tuc va » thuc va, truc va, duc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang xa hoi. thieu bien cac ((tuc va) OR (tuc xa)) hanh tai ((ve triet) or (va thiet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang xa hoi. thieu bien cac ((tuc va) OR (tuc xa)) hanh tai ((ve triet) OR (va thiet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang xa hoi. thieu bien cac ((tuc va) OR (tuc xa)) hanh tai ((ve triet) or (va thiet))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang xa hoi. thieu bien cac ((tuc va) OR (tuc xa)) hanh tai ((ve triet) or (va thiet))*.